ML031130066

RAI, Related to Relief Request No. 5

ML031130066
Person / Time
Site:	Monticello
Issue date:	04/24/2003
From:	Padovan L NRC/NRR/DLPM/LPD3
To:	Denise Wilson Nuclear Management Co
Padovan L
References
TAC MB6956
Download: ML031130066 (4)

Text

April 24, 2003 Mr. David L. Wilson Site Vice President Monticello Nuclear Generating Plant Nuclear Management Company, LLC 2807 West County Road 75 Monticello, MN 55362-9637

SUBJECT:

MONTICELLO NUCLEAR GENERATING PLANT - REQUEST FOR ADDITIONAL INFORMATION RELATED TO RELIEF REQUEST NO. 5 (TAC NO. MB6956)

Dear Mr. Wilson:

Nuclear Management Companys letter of December 6, 2002, submitted Relief Request No. 5 associated with the fourth 10-year interval inservice inspection examination plan for the Monticello Nuclear Generating Plant. The U.S. Nuclear Regulatory Commission staff finds that it needs additional information to complete its review, as indicated in the enclosure to this letter.

I discussed the enclosed request for additional information with Mr. J. Fields of your organization on April 22, 2003. We agreed that you would respond to this request by April 28, 2003. If you have questions or need to revise this date, please contact me at (301) 415-1423.

Sincerely,

/RA/

L. Mark Padovan, Project Manager, Section 1 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-263

Enclosure:

Request for Additional Information cc w/encl: See next page

ML031130066 OFFICE PDIII-1/PM PDIII-1/LA PDIII-1/SC NAME MPadovan RBouling LRaghavan DATE 04/23/03 04/23/03 04/24/03 REQUEST FOR ADDITIONAL INFORMATION RELATED TO INSERVICE INSPECTION RELIEF REQUEST NO. 5 NUCLEAR MANAGEMENT COMPANY (NMC), LLC MONTICELLO NUCLEAR GENERATING PLANT DOCKET NO. 50-263

1. As a basis for Request for Relief No. 5 dated December 6, 2002, NMC stated that the control rod drive housing joints are VT-2 examined as part of the periodic reactor pressure vessel leakage and hydrostatic pressure tests. These tests are conducted with the vessel temperature much less than the design operating temperature. For a typical test, the vessel temperature would be 212 degrees F, as compared to a normal operating temperature of about 540 degrees F.

Please confirm that NMC is following the American Society of Mechanical Engineers Code,Section XI, IWA-5000, IWB-5240 temperature requirements when performing periodic reactor pressure vessel leakage and hydrostatic pressure tests.

2. Please provide the numbers and results of your inspections of the control rod drive mechanism (CRDM) bolting. How many of new-type bolts, as required by General Electric Services Information Letter No. 483, were installed in the CRDMs?

3. Please provide the material of the bolts and environmental conditions that these bolts are subject to during operation? Also, what is the degradation mechanism of these bolts?

4. How does NMC determine that leakage from the CRDMs has stopped when the operating pressure and temperature is reached?

Monticello Nuclear Generating Plant cc:

Jonathan Rogoff, Esquire Commissioner General Counsel Minnesota Department of Commerce Nuclear Management Company, LLC 121 Seventh Place East 700 First Street Suite 200 Hudson, WI 54016 St. Paul, MN 55101-2145 U.S. Nuclear Regulatory Commission Adonis A. Neblett Resident Inspectors Office Assistant Attorney General 2807 W. County Road 75 Office of the Attorney General Monticello, MN 55362 445 Minnesota Street Suite 900 Manager, Regulatory Affairs St. Paul, MN 55101-2127 Monticello Nuclear Generating Plant Nuclear Management Company, LLC Mr. Roy A. Anderson 2807 West County Road 75 Executive Vice President Monticello, MN 55362-9637 Nuclear Management Company, LLC 700 First Street Robert Nelson, President Hudson, WI 54016 Minnesota Environmental Control Citizens Association (MECCA) John Paul Cowan 1051 South McKnight Road Chief Nuclear Officer St. Paul, MN 55119 27780 Blue Star Memorial Highway Covert, MI 49083 Commissioner Minnesota Pollution Control Agency Jeffrey S. Forbes 520 Lafayette Road Senior Vice President St. Paul, MN 55155-4194 Monticello Nuclear Generating Plant Nuclear Management Company, LLC Regional Administrator, Region III 2807 West Country Road 75 U.S. Nuclear Regulatory Commission Monticello, MN 55362-9637 801 Warrenville Road Lisle, IL 60532-4351 Nuclear Asset Manager Xcel Energy, Inc.

Commissioner 550 15th St., Suite 1000 Minnesota Department of Health Denver, CO 80202 717 Delaware Street, S. E.

Minneapolis, MN 55440 Douglas M. Gruber, Auditor/Treasurer Wright County Government Center 10 NW Second Street Buffalo, MN 55313 March 2003